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Patent Searching and Data


Matches 351 - 400 out of 1,708

Document Document Title
WO/1996/029585A1
A cladded birefringent pressure sensor for use in a pressure-sensing system. The sensor is a single composite plate consisting of two plates (122, 124) each with different indices of refraction. One surface of the sensor is exposed to th...  
WO/1996/017234A2
A pressure sensor (1) includes a crystalline material (2) and a pressure transmission device (30) to transmit the ambient pressure at the location of the pressure sensor (1) to the crystalline material (2). An input coupling device (4, 5...  
WO/1995/023551A1
In a pressure measuring device, in particular for medical pressure measurements, a mechanical pressure sensor is connected to an evaluating electronic system (10) by means of a beam wave guide (3). In order to compensate adulteration of ...  
WO1994016346A1
The converter comprises a sensing element (2) based on a fused biconical splitter consisting of multimode optical fibres (3) with a reduced-mode constriction (4). The constriction (4) is situated within a silicon membrane (5) housed in a...  
WO/1994/004898A1
An ultra-sound testing device for gas pressure accumulators is used to test a predeterminable set position that can be taken by a movable separating element (20) inside an accumulator (10) that can be filled with gas and connected to a f...  
WO/1994/002816A1
A sensor for use in an optic system to detect current conditions in an environment. The sensor has a crystal member with a first waveguide extending from a top surface and a second waveguide extending from a bottom surface of a core memb...  
WO/1994/000051A1
This invention relates to a blood pressure transducer (8) and provides a safe and economical transducer by providing a novel optical fiber (80) made of a transparent elastomer. The present invention provides an invasive direct blood pres...  
WO/1993/022643A1
A method and apparatus for measuring differences between forces, pressures, and combinations thereof. One or more force or pressure deformable members, preferably metal bellows, are internally connected by rigid linkage which is in turn ...  
WO/1993/022624A1
An optical displacement sensor (10) comprises a flexible tube (13) having a reflective internal surface. One end of the tube (13) is connected to a light source (14) via a solid optical fibre (11). The other end of the tube (13) is conne...  
WO/1993/022645A1
Apparatus for measuring pressure, which apparatus comprises a pressure valve (3) for location at a point at which pressure is to be measured, a primary tube (1) containing a fluid for linking the pressure valve (3) to a control point whe...  
WO/1993/017314A1
An optical fibre pressure sensor in which two or more lengths of side-hole fibre (1, 2) are joined together at their ends, in which at a joint (3) the two pieces are rotated relative to one another around their common longitudinal axis, ...  
WO/1993/008478A1
A microwave resonant cavity (2) contains a dielectric (3) whose normal RF electromagnetic modes are varied by displacement of a probe (6) whereby acceleration of the cavity displaces the probe (6). The acceleration vector or displacement...  
WO/1993/004343A1
A nonintrusive flow sensing system (10) and related method are provided for monitoring fluid flow within a conduit (14), particularly such as a liquid flow (12). The sensing system (10) includes an array of ultrasonic transducers (18, 20...  
WO/1992/010730A1
The object of the invention is a method and sensor (10) for measuring air pressure by means of a membrane (14) in such a way that air pressure is allowed to affect both sides of the membrane, whereupon the pressure difference between the...  
WO/1992/002912A1
An apparatus for determining various physical quantities such as temperature, pressure, stress, strain, distance and the like in a manner such that a change in the physical quantity of interest results in a measurable change in the frequ...  
WO/1992/000506A1
The optical fibre parameter measuring device comprises a light source (S); at least one optical fibre (1) which is sensitive to the measured parameters (P1, P2) and has stable modes triggered by the light source (S), whereby a variation ...  
WO/1991/019965A1
A fibre optic pressure sensor has a pressure-measuring head (10) with a housing (12) which houses a membrane (13) which functions as a pressure sensor and executes a lifting movement when subjected to pressure. The inside (13') of the me...  
WO/1991/016612A1
A method for determining the field of pressure of a continuous fluid medium (1) on the surface of an object (2), based on the effect of quenching the luminescence of certain luminophores by an active substance and providing for the appli...  
WO/1991/013329A1
A pressure sensor is described which uses a single mode optical waveguide such as a single mode optical fibre (11). Light is supplied to the fibre via a polarizer (12) and is received from the fibre either, after reflection, through the ...  
WO/1991/012545A1
A quasi-distributed sensor array in an optical fibre (10), wherein the sensors are divided along the fibre by intermodal coupling zones formed by insulating the optical fibre (10) using a laser beam (16) passing through a mask (18) havin...  
WO/1990/015975A1
A transmitter (10) measures pressures and has a pressure sensor (88) and an additional pressure sensor (90) providing additional measurement capability to the transmitter (10), such as an extended measurement range or measurement redunda...  
WO/1990/002322A1
The apparatus comprises a receptacle for holding a quantity of reference material having known variation of refractive index with changes in the test parameter (which may be temperature, pressure or the like); an elongate optical wavegui...  
WO/1989/006512A1
An optical reflection hydrophonic probe is useful for determining the pressure-time behaviour of pressure waves in fluids. One end of an optical waveguide (glass fibre) dips into the fluid. The reflection of light at the tip of the glass...  
WO/1989/006350A1
The present invention concerns a differential pressure meter for measuring differential pressure between two different points. As taught by the invention, the meter comprises two vertical, substantially transparent tubes (1, 2), said tub...  
WO/1989/001132A1
An apparatus for measuring a characteristic of a fluid such as fluid velocity, humidity, pressure and the like. The apparatus comprises a sensor semiconductor means (17) to be disposed in said fluid. A heating means (25) is provided to s...  
WO/1988/003388A1
In an ultrasonic process for pressure measurement in a liquid containing stabilized micro-bubbles in a system, ultrasonic pulses are irradiated into the liquid and made to interact with micro-bubbles. The amplitude and/or frequency chang...  
WO/1988/002545A1
An optical apparatus for measuring physical quantities, comprising an optical transducer (33) for sensing position, outgoing and return optical fibers (20, 23), and an electronic sensor control module (43). Light is generated at the cont...  
WO1987007014A3  
WO/1987/007014A2
A pseudo random bit sequence is amplitude modulated onto a light source (2) (other types of modulation are discussed in the specification) and this modulated beam is transmitted down an optical fibre (3) or any material and the detected ...  
WO/1987/004789A1
Pneumatic pressure sensor of the kind where the pressure to be sensed acts on a diaphragm (50) which moves to control the exhaust of gas from a pressurized control chamber (20). The invention provides means for inhibiting or preventing t...  
WO/1986/000988A1
A fibre-optic cable responsible to microbending and forming part of a device for measuring pressure in accordance with the principle of creating a periodic mechanical disturbance in the fibre. The cable comprises a fibre (F) having a cor...  
WO/1985/005678A1
A transducer to measure pressure or temperature comprising a quantity of compressible material such as gas and a quantity of incompressible material such as liquid and proper means (16, 17) to detect volume and interface(s) (14) changes ...  
WO/1985/004473A1
Optical pressure sensing apparatus comprises an optical fibre interferometer (4) arranged to sense the movement of a pressure responsive element (3) and produce an interference signal at its output (20) which can be monitored and process...  
WO/1985/003855A1
An optical fiber fluid flow device is provided for in vivo determination of blood flow in arteries. The device includes a fiber optical fluid pressure measuring device having at least first and second optical fiber sensors which optical ...  
WO/1983/003136A1
A closed pressure monitoring system (20) in which a pump (27) delivers gas on a supply line (22, 29) through a first accumulator chamber (30) to a load device (21) and returns the gas on a returnline (23, 28) through a second accumulator...  
WO/1982/003976A1
An apparatus (10) which measures and monitors the pressure within a human body includes a pressure sensor (11) having a housing (30) closed by a pressure sensitive diaphragm (34) to define a plenum (35), an exhaust tube (36) mounted with...  
WO/1981/000618A1
An optical fiber (10) having at least two cores (12 & 14) positioned in a common cladding (16) can be fabricated to be responsive to strain or hydrostatic pressure (20) but not to temperature through the selection of materials, spacing a...  
WO/1979/000377A1
A sensor for measuring stress, temperature, pressure, sound, etc. comprising an optical fiber waveguide (24 of Fig. 6), a light source (22) which injects light (30) into one end of the waveguide, a deformer (27) contacting and deforming ...  
JP6553299B2  
JP6526978B6  
JP6541659B2  
JP2019090837A
[Subject] The present invention relates to an optical displacement sensor including the 1st reflexible surface and 2nd surface for which it has a diffraction pattern partially at least. [Means for Solution] The surface is provided on an ...  
JP6526978B2  
JP6510522B2  
JP6504685B2  
JP2019052936A
To provide technology for eliminating the effect of tension of a measurement object and measuring an accurate pressure value when performing pressure measurement by a tonometry method using a pressure sensor equipped with a diaphragm.A p...  
JPWO2017208645A1
The measurement accuracy of a liquid flow rate can be improved and the reproducibility of measured value can be improved. The light source by which a flow measuring device emits light to a measuring object part, and the photo acceptance ...  
JP6486555B2  
JP2019505262A
An ophthalmic surgery system contains at least one light source. A light source is constituted so that light may be outputted toward a fluid engineering cassette, therefore the 1st portion of light is reflected from a diaphragm which a f...  
JP2019028017A
To provide an optical fiber sensor capable of improving measurement precision.An optical fiber sensor comprises: a Roberval mechanism 5 which has a fixed part 51 and a movable part 52 arranged side by side and also coupled by a first bea...  

Matches 351 - 400 out of 1,708